Lifting jack



April 7, 1925.

GILANE LIFTING JACK Filed Nov. 10, 1924 2 sheets-Sheet l Inuenior:

G orge Lane, 12

iys.

Aprifi 1, 19125. I 1,532,702

. (5. LANE LIFTING JACK Fil Nov. 10, 1924 2 Sheets-Sheet 3 Q l w,lywwalumm Patented Apr. 7, 1925..

STATE PATENT OFFICE.

GEORGE LANE. OF PO J'GHKEEPSIE, NEW' YORK, ASSIGNOR TO LANE BROTHERSCOM- PANY, OF POUGHKEEPSIE, NEW YORK, A

JOINT STOCK ASSOCIATION OF NEW YORK.

LIFTING JACK.

Application filed. November moderate price automobiles makes a. demand(especially from the makers) for a low priced and eiiicient jack that.will cover the requ red range. of lift The ranere of lift -for a balloontire jack must be excessive, as compared with the usual recentstandards. To be more specific, the evtended height should be at least 2times the collapsed measurement.

The increasingly low rear construction of cars makes almost obligatorythese features: (a) ability to place the jack from the back of the car:(77) lifting should be on the head of the jack and not from some lowerpoint (because spring and axle construction interfere with using a talljack; it cannot be broue'htinto place to act a bearing on a low liftingtoe): and (0) also b cause of low construction and general consrestionaround the rear there is not much room for a pump handle action. forwhich reasona rotating handle is coming" more into favor.

The said invention aims to provide a jack which will meet all the erequirements. and one which will be strong: and durable in use. andcapable of being! easily and quickly operated. and the inventioncomprises the novel onstruction and arrangement and combination of partshereinafter described, and defined by the appended claims;

An embodiment of my invention is illustrated in the accompanyingdrawings, in which:

Figure 1 is a side, elevation of the jack in extended position.

Fig. 2 is a similar view in ciiilapsed condition.

Fig. 3 is a view similar to Fig. 1, but looking' at right anglesthereto.-

Fig. 4 is a plan view, and Fig.5 is a section on line 5-5 of Fig.

10, 1924. Serial No. 743,951.

drawings, the numeral 1 designates the base or foot of the jack to whichis secured a hollow standard or post member 2 'having' a screw threadedexterior. Preferably the, standard is applied to the base by making itslower end cylindrical and inserting it in a. corresponding opening inthe base witha drive fit, as indicated at 1, the open end of thestandard being closed by a disc or plug 2*.

3 designates a tubular shell or sleeve meniber which is provided at itslower end with a nut portion 3 having internal threads corresponding toand engaging the exterior threads of member 2. The sleeve member 3 isprovided at its upper end with a nut portion 3", the threads of whichare reversed relative to the threads of post 2. and which correspond toand engage the exterior thr ads of an upper screw member 4, the exteriordiameter of which is less than the internal diameter of post 2, wherebythe former can lower or telescope into the latter to collapse the jack.The threads are preferably of the Acme type."

It will be readily apparent that if the upper screw 4 is held againstrotary movement while sleeve 3 is rotated. said sleeve 3 will be screwedup or down on the. post 2, according to direction otrotation. whilescrew 4 will be correspondingly moved relative to sleeve 3, giving toscrew 4 a doubly acceleratedmo ement.

It will also be observed that in the extended position; the jack is morethan two and a quarter ;times as high as when collapsed, the additionalamount being secured by the sleeve 3. and all of the parts fittinewithin each other in collapsed position. Q

It is apparent that 1'11G21T1-.|IT1HS1C be pro- Vided for rotating thesleeve; while permitting vertical movement thereof.

This I accomplish by bevel"- gear 5 fast on sleeve 3 and preferably madeintegral therewith, said gear 5 meshing with bevel gear 'fifast onrotary shaft member '1 iournaled in bracket 8 of member 8,"'wlrich hasajcylindrical passage through which jnut carrying member 3 passes and inwhich it is freii to rotate, IiiGUiiDGl' held against rotary movement hythe tnhnhir guide harm-- her or portion 8 depending from hraeki'et. andsiivhihiy engaging the guide post i rigidly carried hy the hose 1. Thusmen;- her 8 is hoid against rotation, lint porn'iiftmii to travel up ordown. according to tho rhre-fstion of rotation of tho sleeve.

For holding the upper SC'KCW against rotary movement i provide the stepor son-- die 10 with o iotoraiiy extending arm 10" pinned to the upperendot :1 depending rod 11 which siidingiy engages a sorket member 8 ofthe bracket P, Preterahiy socket nieznhers 8 and 8 are PiHCOii on eachside of and adjacent to the operating shaft in which position theycannot interfere with the phicemont oi the jot-ii: dose to verticalsurfaces, as for ercznnpi thohroiie drums or housings.

The shaft 7 is adapted to he e aged hy the socket 199 of a snitahieoperating; how (He 32. the i'fimmec'cion being prei omhi v of thehayonot joint typo, wherein: the jack may he tiioceli in position antironi'nrari h the handle, thus dispensing; with the mono sity of crmviingr reaching under the for.

As the gniiiio posts aid rockets are dis-- poseri on opposite sides ofthe operating; shaft and eqni-iiistoht thereirrm' the jack is haionoeriroiative to the haifitiie anti tendenoy to rotate on the honciie as :1pivot (when lifted there is avoided.

A roller 13 Carried by the hmcket 8 hours on the upper surface of 021? 5(ii eetiy shove the 6, and resists on tiith'ig tendon v (line to thedriving oothm of gear 6 Wi' by any binding of? the screws is preveoteti.

Scr-W memher iis provided with means such as an transverse pin or key 4to prefvont its being screwed entirely out of out memhor 3 which hmitsthe range of oiovzv firm of the jack. protornhiy the arm 10 s madesioping, whivh prevents its hoing used as n iiitingl hood. requiring theoperator to use the snddie 1'0 tor the contact part which. insurestho'iitting strain heiog brought on the screw ports in :mioi niino menttherewith, promoting" Shh, strain and binding.

W0 prefer to provide an nni' htriotion hearing: between the mornhmi 8mini Fi("" '3 and to this and provide the horo ot' momhor 8 throughwhich ti o sioovo pose apart by sofgiinern'iii s--h.:ipef! 5120 other,,1 loo projonrnoied on the shell, a rotary shaft IUUHHtWi. in thesumgort, a gear thereon on gngnw he hi-st nznnod gem, and means con-Hi'lfilfli from the hose for preventing rotu- Lion 01" the support. Alifting; izio s. comprising screws of opposito piirh zittnn:

littiog one Within the otheiz Using the two scroi s and provided with"nits at its ends to engage the soreii's. QY'EM test to the shoii, asupport ionrnaieii on th shoii, :1 rotary shaft n'soui'itod in the sowort and worrying a gear I I engaging; mo gear on the shed, and meansnirhidori in the gack structure and external to both screws forrestraining {LX181 rotation of hoth aid :soo'ft support aiiri thesmeiier screw,

41, iiflvin 31 2i? comprising screws of opp site pitei tilting onewithin the other, shell enclosing two and pro video with nuts its endsto engage the screws, :1 it to the shell, a su ooort journsieci (o thoshell, a rotary shaft monnteci in the support and carrying; a gearmoshing with the on the shah and a stud extemiing npn oraiiy from thebase anti siidahiy ei'igre' eci S'iiifi support.

jack comprising screws of opposite pitch itting one Within the other, ashell endorsing the two screws and pro Vifififi with nuts at its ends toengage the screws. a gear fast to the sheii, slip ort jonrhaied on thesheii, a, rotary s oft monnteo in the support moi carrying a, gearmoshing with the gear on the shell and a stud extondi' g upwardly fromthe base and siichrhiy oogogod, by said support, a rori at one siio ofand parallel to the smslier screw, the. said rod 5. screw being ri iiiyeon iiootw'i 5 their ,np'per ends, the oepending oni'i said rot?siitiohiy onp'zzgec i hv sniti sopportii eniher.

8, A iittiogr i 1: comprising}; a hose, a lover vertical in :r oorrieoithereby,

it opposite witch min )ted to t ,v i 1 Y *5 to me iower screw, 21 soehem 5: screws oooi provided with its upper and lower ends Hi soz'uwsrespeotiveiy, a gear riliiv extending; shaft jonrnoieii it and oorryinga gear moshing iin'h' r-oinnrisino; screws of with the gear on theshell, saidgsupport carrying a pair of vertical guides, awigid postextending upward from the baseand engaging one of said guides, and asecond post aving its upper end rigidly connected to -theupper end ofthe upper screw and engaging the other guide. v

7. A lifting jack, comprising a Base, a lower vertical tubular screwcarried thereby, an upper screw of opposite pitch adapted to telescopewithin the lower screwfla shell embracing the two screws and providedwith nut portions at its upper and lower ends engaging said screwsrespectively, a gear fast'to the-shell, a support journaled on theshell, a laterally extending shaft journaled in the-support and carryinga gear meshing with the gear on the shell, said support carrying aair ofvertical guides, a rigid post extending upward from the'hase andengaging one of said guides, and a second post having its upperend'rigidly connected to the upper end of. the upper screw and engagingsaid guldes being arranged at equal distances on opposite sides of saidlaterally extending shaft whereby the weightof the jack is balanced. 0

8. A lifting jack comprising a base, a hollow 1 screw carried thereby,an upper screw of opposite pitch adapted to telescope the other guide,said posts andwithin the hollow screw, a shell encircling the two screwsand provided with nut portions engaging the same, a gear fast on theshell, a support journaled on the shell, 'a'

rotary shaft mounted in the support and carrying a gear meshing with thegear on the shell, a saddle on the upper end of the upper screw having alaterally extendin downwardly inclined arm, and a guide rod dependingfrom said arm and slidably engaging said support.

- In testimony whereof I afiix my signature. GEORGE LANE.

